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Other federal assistance, including funding for governments and nonprofits on a cost-sharing basis for emergencies, will be made available in 37 counties.

The first 10 counties were declared disasters on Monday, while other counties were later added to the list. Gov. Pat McCrory said those counties weren't on the original list because no flooding had occurred there when the first flyovers were conducted. Other counties devastated by flooding will be added as the situation goes along, McCrory said.

FEMA officials said people who sustained losses can register online at disasterassistance.gov or call 1-800-621-FEMA(3362) between 7 a.m. and 9 p.m. seven days a week.

Matthew dumped more than a foot of rain in parts of inland North Carolina, and major to near-record flooding is forecast in multiple areas. Some cities closer to the coast won't see rivers crest until later in the week.

Hundreds of thousands of people lost power as a result of the storm, and more than 1,400 water rescues have taken place. At least 20 people have died, and thousands of people had to move into shelters.